Remove cullRect() from PaintOpBuffer.

cc/paint/drawing_display_item.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/paint/drawing_display_item.h"
 
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace cc {
 
 DrawingDisplayItem::DrawingDisplayItem() : DisplayItem(DRAWING) {}
 
-DrawingDisplayItem::DrawingDisplayItem(sk_sp<const PaintRecord> record)
-    : DisplayItem(DRAWING), picture(std::move(record)) {}
+DrawingDisplayItem::DrawingDisplayItem(sk_sp<const PaintRecord> record,
+                                       const SkRect& bounds)
+    : DisplayItem(DRAWING), picture(std::move(record)), bounds(bounds) {}
 
 DrawingDisplayItem::DrawingDisplayItem(const DrawingDisplayItem& item)
     : DisplayItem(DRAWING), picture(item.picture) {}

[danakj, 2017/05/19 15:30:10]

I think this is the MSAN failure. The copy constructor doesn't copy the |bounds|
from the other item. I will confirm, also verify if this is what's causing the
disappearing UI things, probably it is.

 
 DrawingDisplayItem::~DrawingDisplayItem() = default;
 
 size_t DrawingDisplayItem::ExternalMemoryUsage() const {
   return picture->bytes_used();
 }
 
 DISABLE_CFI_PERF
 size_t DrawingDisplayItem::OpCount() const {
   return picture->size();
 }
 
 }  // namespace cc